Cottonwood Heights, Utah-based Imagine Health, a creator of custom provider teams of hospitals and physicians, has raised $21 million in Series A funding. Trident Capital and HLM Venture Partners led the round. In conjunction with the funding, John Reardon and Arneek Multani of Trident Capital and Peter Grua of HLM Venture Partners have been added to Imagine Health’s board of directors.

Siva Power, a solar energy company, has raised $10 million from several sources, including $4 million in funding from DBL Investors, Medley Partners and Acero Capital. Siva also converted $3 million in debt financing the company received in May 2014 from Trident Capital, DBL, Medley and Acero, as well as the city of Wuxi, China as a new investor. The company also received $3 million from the U.S. Department of Energy SunShot Initiative, bringing total capital raised to $10 million.

San Francisco-based referral marketing platform Extole has raised $14 million in Series C funding. Scale Venture Partners led the round with participation from Norwest Venture Partners, Redpoint Ventures, Shasta Ventures and Trident Capital. In conjunction with the funding, Stacey Bishop, a partner at ScaleVP, has been added to Extole’s board of directors.

Silicon Valley-based Host Analytics, a provider of enterprise performance management solutions, has closed $25 million in funding. Centerview Capital Technology led the round with participation from return backers Advanced Technology Ventures, Next World Capital, StarVest Partners and Trident Capital. In addition to the funding, Ned Hooper, founding partner of Centerview Capital Technology, has been added to Host Analytics’ board of directors.

Mandalay Digital has agreed to buy Appia, a mobile user acquisition network. According to terms of the deal, Mandalay Digital will buy Appia’s equity for $65 million based on its closing November 12 stock price of $3.40. Mandalay will also assume Appia’s approximate $10 million debt. The deal is expected to be completed in the first quarter of 2015. Appia’s backers include Venrock, Trident Capital, DCM and Eric Schmidt’s TomorrowVentures.

Advanced solar energy business Siva Power has secured backing of $15 million. The new capital came from four investors, including three existing investors: Trident Capital, DBL Investors and Acero Capital. The city of Wuxi, China came in as a new investor.

Global payment processing service 2Checkout said Thursday that it has closed $60 million in funding. Chicago Growth Partners and Trident Capital led the round. According to the firm, the capital infusion will be used to accelerate expansion of its global payments processing platform.

Fluid said Monday that it has acquired 8thBridge. No financial terms were disclosed. Based in Minneapolis, 8thBridge, which is backed by Trident Capital and Split Rock Partners, is a provider of social discovery, curation, analytics and marketing solutions for retailers.

Security investing continues to run at high throttle, affiliated publication VCJ reports. Overall venture dollars committed to security startups dipped slightly last year, but still broke the $1 billion mark, according to data from Thomson Reuters.

Mocana, a provider of a platform that helps secure mobile devices, has received a strategic investment from GE Ventures, with existing investors Shasta Ventures, Southern Cross Venture Partners, Symantec and Trident Capital also participating in the round. The company told peHUB that the amount of the round was $15 million. San Francisco-based Mocana previously raised $47 million in funding, the company said. This includes a $25 million round in July 2012 at a $138.9 million valuation, according to Thomson Reuters (publisher of peHUB).

AlienVault said it raised $26.5 million of Series D funding in a deal led by GGV Capital and joined by existing investors Trident Capital, Kleiner Perkins Caufield & Byers, Sigma West and Adara Venture Partners. Other new investors include Top Tier Capital and Correlation Ventures. The funding will be used to scale the company’s sales and marketing efforts.

Blue Coat System’s acquisition of Solera Networks is the latest exit of a venture-backed security company, and a lucrative one, too. Allegis Capital, an early backer of Solera, expects a return of more than 10x on its first money. Trident Capital also is turning a tidy profit.

Private company valuations for security companies are up, but venture investors remain excited about putting to money to work. There is no secret why. Governments and corporations are under attack from cyber hacks, and IT budgets are being freed up for products and services to strengthened digital defenses.